1,500 Euro in 2015, now 20,000 Euro?

Hampel, from Germany, sells on 28 March 2019 a "Frans Francken II" Preaching of Saint John the Baptist, estimated at 20,000 to 40,000 Euro (which is quite a wide margin).

The painting looks awfully close (also in dimensions) to one I already discussed in 2015, when it was for sale in Ireland (at Sheppard's) as a "Seventeenth-century Dutch school" with an estimate of 1,500 to 2,500 Euro, after having been offered in 2014 already for 3,500 Euro.

It looks as if after the 2015 sale, it has been unframed (revealing slightly more to the sides), and lightly cleaned, and my tentative attribution to Francken confirmed.