When I upgraded to routeros 6.48.2, I began experiencing massive slowdowns. I initially thought the problem was only with the wireless connection of the router but the entire router was impacted. I have a 1GBPS connection from my ISP and was getting only 90MBPS. This was with a desktop connected directly to the LAN interface of the router.
I rolled back via the downgrade command and the router is back to running normally.
However, the version still shows 6.48.2 so I do not know what got downgraded but the router is back to normal.
board-name: hAP ac
model: RouterBOARD 962UiGS-5HacT2HnT
I do not know what is happening and am happy to submit diagnostic information.