As long as it clears itself and doesnt leave a MIL lit, all is well. Of note though is that the valve for the heat loop in the tank can fail and when it does it fails open, so that the DEF in the tank gets overheated, leading to “bad DEF”. Some folks here who have experienced this have overridden or bypassed the heat loop by adding an exterior mechanical valve on the engine coolant lines that provide the heat for the system.
In some cases people have blocked it off entirely which would be fine if you never get into low temps. But even though DEF theoretically starts to freze at 12*F, Ive had DEF system issues when in the low 20’s and high teens. So I see the system as necessary, but Im not opposed to adding a valve on the coollant (misleading term, but thats what it is) supply side so I have control over it if and when the internal valve fails. In a pinch (
) you could clamp it off with needle nose vice grips.