Writing to a tag issues

Several weeks ago I add some toggle switches to a project.
Some write to a DINT and others toggle a Boolean.
The worked with no issue.
Today the customer reported an issue with them.
They don’t respond at all and cause this error;
Traceback (most recent call last):
File “event:mouseReleased”, line 7, in
java.util.concurrent.TimeoutException: java.util.concurrent.TimeoutException

caused by TimeoutException

Ignition v8.0.17 (b2020111211)
Java: Azul Systems, Inc. 11.0.7

Then the app locks up.
This also happened to me in both client and developer.
The system locked up then after a min or so all the tags on the open window went bad.
I checked the OPC Server (for AB ControlLogix) and it seemed fine.
All the tags being accessed by the switches do exist.
I see no issue with the PLC.

Any thoughts?

Can you post the code on the mouseReleased event?

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