WiFi Drops Every Hour

Hello - Same issue for me here. My setup is made of one RBE371 and 2xRBE370, firmware V12.1.3.11_5.1.12, acquired end of October 2025.
Initially I thought the issue was coming from my ISP Live TV stream that was freezing for 1 to 5 second every hour (my ISP TV box is connected via WiFi to a RBS), knowing that during the same period my ISP had also some TV stream issues on their side. But now the ISP issues have been fixed and I still have these hourly freezes.
Today, after reading these posts, I started a ping against the IP address of the RBR from a Mac connected via WiFi to a RBS nearby,  just before the time the issue was expected to happen. I could then see, at the expected issue time, the RBR no longer responding to the ping and the TV live stream having the issue at the same time.
I applied a channel value change to the 5 gHz following recommendations read earlier in the thread, the drop issue didn't disappear but change time to the time the wifi channel change was applied (was previously every 34' past an hour, now 5' past an hour).
So I'm now convinced that something recurrently en regularly happens in the Netgear setup that impacts my user experience. 
I'll open a new ticket accordingly.