Is there a shortage of bus drivers?

Ik it’s a stupid question because there is always a shortage of anyone employed by the county, but would anyone happen to know if there’s more of a shortage of bus drivers than there usually is? I’m just wondering specifically because when I check the MDT transit app lately there will sometimes be two or three buses in a row for the 107 route that say “TBD” rather than a bus number and reflect the posted schedule, or 11 will be marked as XYZ minutes away for upwards of 20+ minutes until one randomly appears. To any bus drivers reading this this is no shade to you at all, you guys are the backbone of this city and I’m sure the shortage is justified by whatever conditions you all are forced to deal with, I am just curious.