get_data() mem leak

[SavageBoo]

if col active at XFD get_data() mem leak

my sheet i use field at col E. but field active at XFD in cell is null.

i use get_data() and view task manager is function run mem push many and leak.

solution
if i del F - XFD is Work!

[SavageBoo]

AFTER

I test is Flask local is work. but prod mem leak always.

Flask==1.0.2
Flask-API==1.1
pyexcel==0.6.4
pyexcel-io==0.6.4
pyexcel-webio==0.1.4
pyexcel-xlsx==0.6.0
pyexcel-xlsxr==0.6.0

[chfw]

what about openpyxl version?

and the sample step to reproduce please