Perspective 8.1.7 -- Occasional "Error reading updated project from Gateway." / "Project Not Found" upon saving

The past few weeks I’ve been getting the following error when attempting to Save from perspective.

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com.inductiveautomation.ignition.client.gateway_interface.GatewayException: project not found: null
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:351)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:325)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:278)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:945)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.pushProject(GatewayInterface.java:978)
	at com.inductiveautomation.ignition.designer.project.PushTask.run(PushTask.java:19)
	at com.inductiveautomation.ignition.client.util.gui.ProgressDialog$TaskRunner.run(ProgressDialog.java:364)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: com.inductiveautomation.ignition.common.project.ProjectNotFoundException: project not found: null
	at com.inductiveautomation.ignition.gateway.project.IgnitionProjectManager.lambda$getProjectProps$0(IgnitionProjectManager.java:133)
	at java.util.Optional.orElseThrow(null)
	at com.inductiveautomation.ignition.gateway.project.IgnitionProjectManager.getProjectProps(IgnitionProjectManager.java:133)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.functions.Projects.canEditProject(Projects.java:318)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.functions.Projects.push(Projects.java:194)
	at jdk.internal.reflect.GeneratedMethodAccessor434.invoke(null)
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(null)
	at java.lang.reflect.Method.invoke(null)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.AbstractGatewayFunction.invoke(AbstractGatewayFunction.java:225)
	at com.inductiveautomation.ignition.gateway.servlets.Gateway.doPost(Gateway.java:405)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:86)
	at org.eclipse.jetty.servlet.ServletHolder$NotAsyncServlet.service(ServletHolder.java:1391)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:760)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:547)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1607)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1577)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
	at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:500)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
	at java.lang.Thread.run(null)

Ignition v8.1.7 (b2021060314)
Java: Azul Systems, Inc. 11.0.11

Has anyone come across this before? I can open a new designer instance and save just fine in that designer until the issue occours again.

Thank you