Scavenge mission gas costs just increased

in Game Issues
After the recent update gas cost for scavenge missions decreased from 5 to 4, but they just increased back to 5 for me. I didn't increase my survivor or player levels. The only thing I did around the time I noticed this was to upgrade my radio tent.
The cost of challenge missions remained at 4
My max survivor level is 15 and player level is 41.
The cost of challenge missions remained at 4
My max survivor level is 15 and player level is 41.
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Wasn't this last update supposed to reduce gas costs of scavenge missions to be in line with challenge missions anyways?