How to turn off/disable the flash alert/notification when its stuck on/enabled?

[Android Central Question]

After nougat 7.0 update, "flash alerts" inside "accessibilities" turned on and wont allow me to turn it off. Whats more is the phone doesnt even flash any alerts. Havent found a system process soly for the flash. T-MOBILE LG-V20 H91810u.

 

[Android Central Question]

After nougat 7.0 update, "flash alerts" inside "accessibilities" turned on and wont allow me to turn it off. Whats more is the phone doesnt even flash any alerts. Havent found a system process soly for the flash. T-MOBILE LG-V20 H91810u.