"Treasury empty in" timer is highly misleading when using mappers

The "Treasury empty in" timer seems to not calculate any queued maps in map devices, calculating only the time it takes mappers to finish their current map - even if they have full 12 maps queued.

Below is the screenshot I took at 10:07 AM after freshly loading in 3 map devices with all 12 maps - these 3 teams alone take almost 45k gold / hour, yet the timer in-game showed I have enough gold for 1h 47min.
Mappers alone would use all my 47k gold in just about an hour considering they have more than 2h of mapping loaded in, so it couldn't be accurate.

In reality, my gold run out at 10:45, 38 minutes after the screenshot, not 1h 47 like the in-game timer suggested.



The problem seems to be with mappers - their timer shows "all work complete in" for just the current map, ignoring other maps they have queued. Below is a recording, the "Treasury empty in" updates as soon as mappers complete a map, deducting 12 minutes from the timer.
https://youtu.be/Pu71f4-NgZI