Check it out https://www.tp-link.com/en/faq-2238.html

Use Omada controller software which can manage all EAPs. https://static.tp-link.com/2018/201803/20180307/1910012370_Omada%20Controller%20Software%202.6.0_UG.pdf

Install the tpPLC utility instead of the powerline scan. https://www.tp-link.com/en/download/TL-WPA4230P-KIT.html#Utility

Check if firmware updated. If yes, I would suggest you contact tplink tec support.

Not here. Change 5G channel. Update firmware.

Are you running any particular program or streaming a certain webiste, like netflix, when problem happens? I don't know how many devices you have and what they are, but it's better to test with only...