"Illiquid" currencies- GTQ?

Details aside, Revolut team can check it and will know better than me anyway, but apparently GTQ rates have a huge markup (around 2% or so) both on weekdays and weekends.

The simple way to check it is by looking at the rate diagram screen and compare the values you can tap on the diagram vs. the ‘current rate’. They are vastly different for UAH, RUB, THB and so for GTQ.

Needless to say I’m not extremely happy about it.

Has anyone else noticed any other currencies not listed in FAQ that do have a markup on them?