control.bode configured with omega_limits not showing minor ticks

[lpdx]

Using omega_limits with 8 dacades we can make Bode plots successfully with both major and minor ticks.
But when increasing then omega_limits to 9 decades the minor ticks in xaxis are not plotted.

Library	Version
control	0.9.4
matplotlib	3.7.2

Minimum working example:

import control
import matplotlib.pyplot as plt

omega_limits = [0.1,1000000]

G = control.tf(1,[1,5000])

plt.figure(figsize=[10,5])
control.bode(G,omega_limits=omega_limits, Hz=True)
plt.savefig('correct.png')
plt.show()

When increasing the omega upper limit to 10000000 (one decade above) the ticks are missing:

import control
import matplotlib.pyplot as plt

omega_limits = [0.1,10000000]

G = control.tf(1,[1,5000])

plt.figure(figsize=[10,5])
control.bode(G,omega_limits=omega_limits, Hz=True)
plt.savefig('wrong.png')
plt.show()

Is this a bug or an undocumented limitation of the package?

I tried to force show minor ticks but it does not work.

[sawyerbfuller]

Might be automatic behavior in Matplotlib? Makes sense to me that at some level of zoom, the small minor lines would become too much. I looked in the source code and didn't find anything indicating that python-control was playing with these minor grid lines: https://github.com/python-control/python-control/blob/main/control/freqplot.py