A current issue...
Where I currently work, we have an industrial facility that has a large central yard which has Wifi coverage thanks to four Cisco external APs installed high up on the surrounding buildings. These operate in Mesh mode (no data cabling). As a result, these things require pretty much uninterrupted sight to each other in order to function properly.
Unfortunately, this particular service yard has a number of large cranes operating in it at all times to move heavy equipment around.
Almost every day, we got alerts from our network team that one or more of the APs had temporarily dropped off the network due to the cranes disrupting the signal.
The solution? Silence all alarms on these four APs and accept that Wifi coverage will often be patchy. The company doesn't want to spend the money running cables up to them and patching them in properly.
Unsurprisingly, the network engineer who specced up this ridiculous configuration and didn't bother getting the APs properly cabled up when they were initially installed is no longer with us...