I'm going to put forth this possibility:
Speed Queen dryers are known to run far longer than necessary on auto dry cycles. My 2017 SQ also dries most loads in about 35 minutes; but left to its own devices the dryer will run a good 35-45 minutes past that point before it shuts off. I always set the dryness level to 'Near Dry', not 'Dry'. Ehb79 is using the 'More Dry' setting, which would cause it to run for a long time past when the load is actually dry.
Although I always use the auto dry cycle, I've learned to set a kitchen timer for 35 minutes and retrieve the always dry load from the machine. Bath towels are the exception. My huge loads of heavy towels need about 70 minutes to be fully dried.
On a load of kitchen whites or bedsheets--something that won't be irreparably harmed by being baked for an extended period--let the dryer run for about 65-75 minutes and see if the control advances. If not, then Lorainfurniture Eugene is probably right. After all, he is an appliance dealer and servicer.
If you've never had a SQ dryer before, you have no idea how long it can run past the point where the clothes are actually dry. Mine has by far the least accurate dryness-sensing system of any dryer I've owned. A 2015 Maytag, which was sold with my house, took the checkered flag as being the most accurate in that department.
Also, try dialing it back from 'More Dry' to 'Less Dry' (or whatever it is called on your cycle dial) and see if that makes a difference.
