I have no experience with dual mass flywheels, but the following observations may help.
Although clutch shudder immediately points to the clutch, experience shows that it may, in fact, have nothing to do with the clutch. There are three other possible areas that can give indistinguishable effects.
The first of these is loose or soft engine/gearbox mounts - although this is less likely to be temperature sensitive.
The second is a dragging handbrake - which may well be temperature sensitive. Both of these should be easy to check.
The third is some fault that changes engine power substantially at clutch engagement rpm due to movement on engine mounts. Usually related to linkage control of throttle plus a carburettor flat spot or excessive movement on the engine mounts, in this case (I assume from the reference to a dual mass flywheel that it is a TD5) I would guess that it could be due to an electrical connection, probably in a sensor or sensor connection that is sensitive to engine movement. Probably not easy to check!
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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