Before doing the following, you should double check you do not have v-sync / g-sync enabled; Studio does not support this, and this is an extremely common cause of script editor related slowness.
It looks like you skipped over half of my reply.
If you cannot provide a repro file right away but there is an alternative, please do it. Do not make engineers ask you for information, this is a massive waste of time for them and adds a lot of friction for them to even begin to investigate your problem. You should make this as easy as you can for them, that’s why we’ve written an entire requirements topic about this: Bug Report Requirements
Please check the microprofiler and if there is a clear impact on performance visible in the profiler, capture a microprofiler dump that you’ve verified contains a sample of the lag spike and upload it to your thread.
Please also answer the beta features / plugins questions in your topic, these can sometimes be very relevant to the issue.