Browser crashes when copying from configuration file

Hi, my HA works so far pretty stable. But when I try to write into the configuration file and try to copy some rows, it crashes always. It happens when using desktop pc or mobile device and also using File Editor or Studio Code Server. Any ideas what could be wrong?

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The problem is not existent any more. Unfortunately I dont know why…

I have the same error, using chrome. In Edge it works…

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Same here - I’ve had the problem for about 18 months now… starting to get desperate for a solution