Record time duration for randomized blocks

Hi everyone,
I have 3 blocks within a randomizer so only one gets displayed. Each block contains a total of 9 questions, and 6 out of 9 are randomized within the block. Enabling Question Randomization invalidates the timing question results for each question within the block. As a result, I would like to record the total duration of the block instead of each question (whichever out of the 3 is shown to the respondent randomly). I have tried the solution in the post below but with the randomization at the block level, this method does not seem to work: https://community.qualtrics.com/XMcommunity/discussion/11260/duration-of-a-block-with-multiple-pages
Is there any way that I can record the time for a block when it is randomized?
Thank you very much. Any suggestions and advice are greatly appreciated!