I haven't implemented the dialog variables, nor use them in my deployments, but given several reports with issues related to them, I looked once quickly over them and I think they are exposed to races. I made a similar remark to a recent PR that was using dialog variables,

Unfortunately I had no time to dig in further, too many constraints with work and family due to pandemic and no deployment that reproduces similar crashes (again, I don't use dialog variables). Near future does not look better in terms of available time. If you or someone else can do it, review the code related to dialog variables. I think getting a variable just references to the share memory location, without any other protection (or cloning).

Alternative, for a while, is to see if you can replace dialog variables with something else, maybe you can use htable, and same same results.

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