This was bugging me for quite some time as I could not for the life of me remember the company but I finally found it. Take a look at what happened to GTG (Genetic Technologies Limited) between November 2017 - January 2018.
PDF is heading down exactly the same path (i.e. a grouped 249D seeking a board spill) for the same reasons (i.e. company directors lost their way and lost shareholders money and confidence along the way) and in the same timezone (i.e. end of November through to end of January). The GTG case is probably more akin to PDF than your frequent comparison of AHF.
However you are absolutely correct "Time will...." tell and that time is coming soon.