It's a stupid long run. I need to clean it more often than I do.Your vent ducting is likely quite restrictive causing extra lint to back -up inside the dryer.
A lot of time the dryer gets pushed back into the wall crushing down the flex duct between the dryer and wall.
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Look into adding an inline booster fan or even a secondary lint trap would help a lot. The lint screens inside dryers allow a lot of shit to pass, as you can seeIt's a stupid long run. I need to clean it more often than I do.
It has a progressive 90 degree turn probably 15 degrees at a time. That ends in a sharp 90 after travelling 40 feet... I need to redo the whole deal but its kinda low on the shit I need to fix around here list...How far is your run. Each elbow adds 5' . Use only solid pipe. Does it go out through wall or roof. 25 -30 is the nax run for a straight pipe. Reduced with each elbow
Look up the dryerjack vent hood video that goes over restriction of most roof vents.