I had a similar experience.
I tested the latest (30/10/2021) sleirsgoevy 6.72 exploit in PS-Phive! and found it to be very unpredictable. I've had a lot of random kernel panics after the PS4 had been runnig for a while which does not happen with the older exploit.
It loads a lot quicker than the older exploit but thats the only good thing I can say about it.
With the older exploit I usually: run the exploit, open and close the browser again, open close a game, enter and resume from rest mode. If the PS4 has not kernel paniced during these steps it usually never will.
I've had rest mode running for months before with no problems whatsoever.
I tried the same steps with this new exploit and it was looking good at first but then I got a random kernel panic when closing a game. I've even had it kernel panic when using the browser even though I had opened/closed it earlier in the day (in the same session).
Just because something is new does not always mean it is better.