Ì have just upgreaded 2 ESP nodes to Custom Vagrant build : ESP_Easy_mega_20211202_custom_IR_ESP8266_4M1M Dec 2 2021.
Unfortunately the both nodes couldn't connect to hidden AP anymore after the reboot (even after cold boot).
As soon as I enabled the SSID broadcast on the AP or after the AP channel was changed to 11, both nodes connected successfully to the same AP quickly.
Another ESP node (ESP_Easy_mega_20210801_custom_IR_ESP8266_4M1M Aug 1 2021) successfully reconnected to hidden AP on all tested channels (11,12,13).
On all three nodes the Fallback SSID is configured (the Fallback APs with weak signal or even missing).