Please, check the following as a possible cause of this issue:
Incorrect settings:
Open the IQOS App and ensure Performance Mode and Pause Mode are turned ON. Activated Pause Mode is illustrated by 2 short vertical lines at the top of the screen and is activated by swiping down your finger across the entire Touch Screen on the device holder.
Pause is already used:
Pause Mode is only available for one of the first two usages delivered by a fully charged holder (Performance Mode).
Eco Mode activated:
Your device has Pause Mode available only in Performance Mode (FlexBattery feature). Pause Mode is not available in Eco Mode. To enable Pause Mode feature, change your FlexBattery feature from Eco Mode to Performance Mode via IQOS App.
Too late in the usage:
Pause Mode is only available within the first 3 minutes or 8 puffs of the usage. If you try to active the Pause Mode outside this range, it will not be available.
Right gesture:
The right gesture to activate Pause Mode is to swipe across the entire Touch Screen. This was done to avoid unintentional activation of Pause Mode.
Battery degradation:
Please, contact IQOS Costumer Care.