Hello Elena,
thank you very much for your response. I am happy to hear that the HDF Group is working on the issue and I understand that the implementation demands a lot work under the hood. Whenever there is a public branch with preliminary code to play around with let us know 
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Thank you as well for clarifying what the ‘full_swmr’ branch is implementing. The information saved me from trying to resolve my issue using it.
Best,
Alex