I don´t know if it´s a known issue, but every time I work on sketchup 2024 on Pc, after 10-15 mins features from the contextual menu like explode and reverse faces as well as it´s shortcuts stop working, I must restar the program to be able to have those features, I´m currently working on a huge project so it takes almost 5 mins to open the program again, its a bit annoying.
I posted this topic recently, it may be what is behind the issues you’re seeing:
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I have had that happen sometimes, I don’t remember after how long it happened though, not ten-fifteen minutes, more like an hour- two hours.