Draftsight: Linee che scompaiono facendo zooming / Appear and disappear of linees during zooming

Ciao a tutti, qualcuno ha avuto il mio stesso problema con Draftsight 2022? Ho dovuto re-installare un service pack antecedente per poter continuare a lavorare. 

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Hi everyone, has anyone had the same problem as me with Draftsight 2022? I had to reinstall an older service pack in order to continue working.