Dualboot / Switch between 2 CFW (Promod and LME)

[Nelamir-gen]

Greetings from Russia. Source data: PSP 3000, 09g. There was Infinity 1.0, PROMOD C2p and LME 2.3. I see 2.0 released, I reshooted a clean 6.61 using the Chronoswitch Downgrader. According to the instructions, I installed the new Infinity and Promod with LME.
Problem: another custom cannot be launched from a running custom. That is, if DuaLauncher is used to switch between them. The console will freeze and shut down. It will also happen if you run, for example, FastRecovery or MeLauncher from an already launched custom, no matter which one. You can switch to another custom only from OFW.
I tried to fix both PROMOD and LME, it did not affect anything.
On Infinity 1.0, the transition between CFW worked well, but now the console hangs and turns off.